1 Answer
1

There's a test

Anybody who wishes to obtain a license to Apparate has to pass a test. From what's mentioned in the books this test appears to be comprised entirely of a practical assessment; the person undertaking the test has to demonstrate that they're able to Apparate both safely and accurately. There's no mention of a written theory component to the Apparition test, as there is for obtaining a driver's license in the UK (and, presumably, other countries).

“You have not, of course, passed your Apparition Test,” he said.

“No,” said Harry. “I thought you had to be seventeen?”

“You do,” said Dumbledore. “So you will need to hold on to my arm very tightly. My left, if you don’t mind — as you have noticed, my wand arm is a little fragile at the moment.”

You might want to mention that the test focuses on safety. Ron fails because of splinching
– ValorumJun 24 at 9:41

8

"“He — he just failed,” whispered Hermione, as Ron came slouching into the room looking most morose. “It was really unlucky, a tiny thing, the examiner just spotted that he’d left half an eyebrow behind... How did it go with Slughorn?” " HBP, Chapter 22, "After the Burial".
– TheLethalCarrotJun 24 at 9:46

27

This answer might benefit from emphasising that the Apparition classes are an extracurricular activity, not a core Hogwarts class - it's like a Muggle boarding school arranging for driving instructors to come in and teach outside of normal classes.
– ChronocidalJun 24 at 11:47

2

@MorZamir There's no suggestion that it involves anything else. The lessons that are described in the book all focus solely on actually Apparating, there's no theoretical knowledge involved. Similarly, all of the mentions of (failed) tests are due to failures to Apparate safely and accurately.
– Anthony GristJun 25 at 8:18

1

Note that the UK driving theory test was only introduced in 1996, so it's probable that JK Rowling never needed to take it, and only muggle of Harry's generation onwards would have done.
– origimboJun 25 at 13:14